What is the average of 2.20 2.50 1.30?

To find the average of a set of numbers, you add all the numbers together and then divide by the total count of numbers. In this case, the sum of 2.20, 2.50, and 1.30 is 6.00. Since there are three numbers in the set, you would divide 6.00 by 3 to find the average, which is 2.00.